[Python-Dev] Sharing functions between C extension modules in stdlib (original) (raw)

"Martin v. Löwis" martin at v.loewis.de
Tue Jun 15 01:09:44 CEST 2010

$ nm build/lib.macosx-10.4-x8664-3.2-pydebug/datetime.so | grep PyTimeDoubleToTimet _000000000000f4e2 T PyTimeDoubleToTimet $ nm build/lib.macosx-10.4-x8664-3.2-pydebug/time.so | grep PyTimeDoubleToTimet _0000000000000996 T PyTimeDoubleToTimet

I have two questions: 1) how does this happen;

'T' means "defined in text segment", so it looks like the code is included twice. And indeed, it is:

exts.append( Extension('time', ['timemodule.c'], libraries=math_libs) ) exts.append( Extension('datetime', ['datetimemodule.c', 'timemodule.c'], libraries=math_libs) )

and 2) is this intentional?

This was added with

r36221 | bcannon | 2004-06-24 03:38:47 +0200 (Do, 24. Jun 2004) | 3 Zeilen

Add compilation of timemodule.c with datetimemodule.c to get __PyTime_DoubleToTimet().

So it's clearly intentional. I doubt its desirable, though. If only __PyTime_DoubleToTimet needs to be duplicated, I'd rather put that function into a separate C file that gets included twice, instead of including the full timemodule.c into datetimemodule.c.

Regards, Martin

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